Hi  @Adol-Cristin,

If your router is having self-rebooting issues, please try the suggestions below: 
1. Make sure the original power adapter is used, try another power socket/outlet.
2. [Only for Comparison] Unplug all Ethernet cables attached to the Router, change the Wi-Fi network name into another one to disconnect all wireless client devices, see if the self-rebooting issue disappears.
 

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